Ristić was included on the Radical Party's electoral lists in the 2012 and 2014 Serbian parliamentary elections. The party did not cross the electoral threshold to win representation in the assembly on either occasion.
She received the twelfth position on the Radical Party's electoral list in the 2016 parliamentary election and was on this occasion elected when the list won twenty-two mandates. She currently serves as an opposition member. Ristić is a member of the assembly committee on spatial planning, transport, infrastructure, and telecommunications; a deputy member of the foreign affairs committee, the health and family committee, and the committee on the rights of the child; a deputy member of Serbia's delegation to the Parliamentary Assembly of the Mediterranean; and a member of the parliamentary friendship groups with Cyprus and Morocco.
- MARINA RISTIĆ, Otvoreni Parlament, accessed 12 June 2018.
- She received the 120th position in 2012 and the forty-fifth position in 2014. See Избори за народне посланике Народне скупштине, 6. мај 2012. године, ИЗБОРНЕ ЛИСТЕ (СРПСКА РАДИКАЛНА СТРАНКА - ДР ВОЈИСЛАВ ШЕШЕЉ) Archived 2017-09-11 at the Wayback Machine, Republika Srbija - Republička izborna komisija, accessed 11 April 2017, and Избори за народне посланике Народне скупштине одржани 16. и 23. марта 2014. године, ИЗБОРНЕ ЛИСТЕ (СРПСКА РАДИКАЛНА СТРАНКА - ДР ВОЈИСЛАВ ШЕШЕЉ) Archived 2018-05-06 at the Wayback Machine, Republika Srbija - Republička izborna komisija, accessed 11 April 2017.
- Избори за народне посланике 2016. године » Изборне листе (Др ВОЈИСЛАВ ШЕШЕЉ - СРПСКА РАДИКАЛНА СТРАНКА) Archived 2018-04-27 at the Wayback Machine, Republika Srbija - Republička izborna komisija, accessed 2 March 2017.
- MARINA RISTIC, National Assembly of Serbia, accessed 11 June 2018.